/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2008-2011, Salzburg Research. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * - Neither the name of the KiWi Project nor the names of its contributors
 *   may be used to endorse or promote products derived from this software
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * Contributor(s):
 *  sschaffe
 *
 * File Info:
 *   User: sschaffe
 *   Date: 2011/02/15
 *   Time: 10:04
 *
 * Project: KiWi2, kiwi-core module
 */

package kiwi.core.webservices.transaction;

import kiwi.core.api.transaction.Transaction;
import kiwi.core.api.transaction.TransactionService;
import org.slf4j.Logger;

import javax.enterprise.context.ApplicationScoped;
import javax.inject.Inject;
import javax.ws.rs.*;

/**
 * Add file description here!
 * <p/>
 * User: sschaffe
 */
@ApplicationScoped
@Path("/transaction")
public class TransactionWebService {

    @Inject
    private Logger log;

    @Inject
    private TransactionService transactionService;


    /**
     * Create and begin a transaction and return the transaction ID as return value.
     * @return
     */
    @POST
    @Path("/create")
    public String createTransaction() {
        Transaction tx = transactionService.getTransaction();
        if(tx.getState() == Transaction.TransactionState.CREATED) {
            transactionService.begin(tx);
        }

        return tx.getId();
    }


    /**
     * Return the status of the current transaction; the current transaction should be passed using the tid query
     * parameter.
     *
     * @return
     */
    @GET
    @Path("/current/status")
    public String getTransactionStatus() {
        Transaction tx = transactionService.getTransaction();

        return tx.getState().toString();
    }


    /**
     * Return the status of the transaction with the given ID. The transaction ID overrides the tid query parameter.
     *
     * @param transactionId
     * @return
     */
    @GET
    @Path("/{tid:.*}/status")
    public String getTransactionStatus(@PathParam("tid") String transactionId) {
        Transaction tx = transactionService.getTransaction(transactionId);

        return tx.getState().toString();
    }


    /**
     * Commit the current transaction using the transaction service. The current transaction should in this case be
     * passed using the tid query parameter.
     *
     */
    @PUT
    @Path("/current/commit")
    public void commitTransaction() {
        Transaction tx = transactionService.getTransaction();

        transactionService.commit(tx);

    }

    /**
     * Commit the transaction identified by the given ID. The given ID overrides the tid query parameter.
     * @param transactionId
     */
    @PUT
    @Path("/{tid:.*}/commit")
    public void commitTransaction(@PathParam("tid") String transactionId) {
        Transaction tx = transactionService.getTransaction(transactionId);

        transactionService.commit(tx);

    }


    /**
     * Rollback the current transaction using the transaction service. The current transaction should in this case
     * be passed using the tid query parameter.
     */
    @PUT
    @Path("/current/rollback")
    public void rollbackTransaction() {
        Transaction tx = transactionService.getTransaction();

        transactionService.abort(tx);
        transactionService.rollback(tx);
    }

    /**
     * Rollback the transaction identified by the given ID. The given ID overrides the tid query parameter.
     * @param transactionId
     */
    @PUT
    @Path("/{tid:.*}/rollback")
    public void rollbackTransaction(@PathParam("tid") String transactionId) {
        Transaction tx = transactionService.getTransaction(transactionId);

        transactionService.abort(tx);
        transactionService.rollback(tx);
    }

}
